In Norse mythology, Óðr (ˈoːðz̠; Old Norse for the "Divine Madness, frantic, furious, vehement, eager", as a noun "mind, feeling" and also "song, poetry"; Orchard (1997) gives "the frenzied one") or Óð, sometimes anglicized as Odr or Od, is a figure associated with the major goddess Freyja. The Prose Edda and Heimskringla, written in the 13th century by Snorri Sturluson, both describe Óðr as Freyja's husband and father of her daughter Hnoss. Heimskringla adds that the couple produced another daughter, Gersemi. A number of theories have been proposed about Óðr, generally that he is a hypostasis of the deity Odin due to their similarities. The Old Norse theonym Óðr derives from an identical noun, meaning 'mind, wit, soul, sense' but also 'song, poetry', which in turn stems from Proto-Germanic *wōðaz, a substantive of an adjective meaning 'possessed, inspired, delirious, raging'. It is cognate with other nouns from medieval Germanic languages, such as Old English wōð (‘sound, noise; voice, song’), Old High German wuot ('thrill, violent agitation') and Middle Dutch woet ('rage, frenzy'). Óðr is also etymologically related to the Old Norse theonym Óðinn, itself deriving from the stem *wōđa- attached to the suffix *-naz ('master of'). Philologist Jan de Vries has argued that the Old Norse deities Óðinn and Óðr were probably originally connected (as in the doublet Ullr–Ullinn), with Óðr (*wōđaz) being the elder form and the ultimate source of the name Óðinn (*wōđa-naz). He further suggested that the god of rage Óðr–Óðinn stood in opposition to the god of glorious majesty Ullr–Ullinn in a similar manner to the Vedic contrast between Varuna and Mitra. The adjective *wōđaz ultimately stems from a Pre-Germanic form *uoh2-tós, which is related to the Proto-Celtic terms *wātis, meaning 'seer, sooth-sayer' (cf. Gaulish wāteis, Old Irish fáith 'prophet') and *wātus, meaning 'prophesy, poetic inspiration' (cf. Old Irish fáth 'prophetic wisdom, maxims', Old Welsh guaut 'prophetic verse, panegyric').